It’s only a matter of time before someone has a cool looking QR code tattooed to their eyelid. A QR or Quick Response code is a two-dimensional matrix that looks like a scrambled barcode, and behaves much like one, with one important difference. The QR code exhibits a rather high level of tolerance for errors. Some have reported that up to 20-30 percent of the QR code can be selectively altered without affecting its ability to be scanned correctly. Try scanning a regular barcode that has some lines missing or has been altered and your scanner is likely to give you a warning beep. The QR code however still scans correctly even if specific areas are missing or changed. This is important because a QR code does not require a high-end, dedicated barcode scanner for it to be scanned, and therefore also makes it suitable for outdoor use. A QR code can be scanned, actually photographed, with a regular smartphone (or other device) equipped with a camera and QR code reading app. This… Read more